Bread-Bakers v098.n015.20

How many teaspoons is 1 pkg of yeast?  I bought a jar of yeast since I
make bread about once a week.  I often come across recipes that say 1
pkg of yeast or 1 small pkg of yeast.  I am worried that adding the
wrong amount of yeast is really going to affect how well the bread turns
out.  Thanks!

Sheryl